期刊
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
卷 267, 期 10, 页码 1867-1872出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2009.02.064
关键词
Cyclotrons; Yttrium foils; Monitor reactions; Proton energy determination; Ionization chambers
类别
资金
- Center of Excellence on Molecular Imaging in Cardiovascular and Metabolic Research
- Turku PET Centre
- University of Turku
- Alberta Cancer Board
- Centre for Biological Imaging and Adaptive Radiotherapy at the Edmonton PET Centre
Excitation functions of the (89)Y(p,xn) nuclear reactions were measured up to 18 MeV by the conventional activation method using the stacked-foil technique, and the irradiation of single foils. Activity assays of the irradiated foils were performed via ionization chamber and gamma spectroscopy methods. Activity ratios of the activation products were measured in two different facilities and evaluated for use as a practical and simple method for proton energy determinations. Cross section values measured in this work were compared with published data and with theoretical values as determined by the nuclear reaction model code EMPIRE II. In general, there was a good agreement between the experimental and theoretical values of the cross section data. Activity ratios of the isomeric and ground state of (89)Zr measured via ionization chamber were found to be useful for proton energy determinations in the energy range from 7 to 15 MeV. Proton energies above 13 MeV were accurately determined using the (89g)Zr/(88)Zr and (89g)Zr/(88)Y activity ratios measured via gamma spectroscopy. (C) 2009 Elsevier B.V. All rights reserved.
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